Question

Determine the mechanical energy of this object: 1-kg ball rolls on the ground at 2 m/s

Answer 1

B.  2 Joules

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Answer 2

Mechanical energy = potential energy + kinetic energyThe ball is on the ground so has no potential energy.
M.E = K.EM.E = 1/2 mv²M.E = 1/2 x 1 x 2²M.E = 2 J